Rubber warming and mixing mill.



PATBN TED AUG.'-7, 1906." G. F. OBERMAIER. RUBBER WARMING AND MIXING MILL.

'APPLIUATION FILED 00127, 1905.

2 SHEETS-SHEET 1.

C. F. OBERMAIER.

RUBBER WARMING AND MIXING MILL. APPLICATION FILED 001227, 1905.

PATENTED AUG. '7, 1906.

2 SHEETS-SHEET 2.

xam M Carl F 06ermaier, {gm/[$07 $6M his mile M40140 WM o the same.

I rapidly reduces the rubber to auniform conj I TED STATES. PATENT OFFICE-Y CARL r; OBERMAl-ER, or" roNK snE-w YORK.

UBBER w Rmme AND MIXING, MILL.

\ No.-827,936. Specification-of Letters Ifatenh. Patented-Lug. 7,1906." Application filedflotober a7, 1905. sem n rs i501.

- To all whom it may concern; worked faster than that in the grooves, due Be it'known that I, CARL E. OBEBMAIER, ato the difference of s eed between these dif citizen of theUnited States,'residing at Yonlp 'ferent parts of the fiatchz. The result'is a ers, county of. Westchester,- and. State of more rapid and thorough mixing and knead- 6o. 5*New York, 'have invented certain new and, ing thanit has been ossible to secure withuseful Improvements in Rubber Warming anypfthe prior mac 'nes with which I am lami 1ar.- Y

and Mixing Mills, of which the following is a The preferred embodiment of my' invem .s ecification, reference being had to the tion is illustrated in the annexed drawings, 6 5' rawings accompanying and forming part of to which reference-will nowbe made-fora more detailed explanation.

-' Figure 1 is a top lan view of themachine;

My invention relates to a paratus for kneading or mixing-rubber, and; as for its obj'ect to .provide amachine of this kind which Figs. '2 and 3 are si e and end elevations, reshallefi'ect the desired kneading or working fspectivel T Y v r5 in an expeditious manner with a greatly-in 1 and 2 designate the end frames of the ma-- cre'ased'output Y chine. In the upper parts ofthe frames are horizontal open spaces'to receive the circular 'be'aringblocks-"3'. The bearings in these blocks are eccentric, and theblocks are arranged so that the thicker sides are presented outwardly. This isfor the reason that the wear on the blocks is practically all in that direction, tending to wear the bearing-openl'arly to Inning-machines in whichthe mixing.

is-effected by a pair of cooperating. rollers; 'zlo i'and the chief feature of my invention con-- sists'in the revision of corrugated rollers, preferably with the ridges and grooves run- ,circumferentially. The rolls are ar- 'g ed so-that the ridges on-oneenterthe' 2 5 1 ch ves in the other, and the rubber is introi' {Iced between them.- One roll'bein driven faster than-the other, the rubber a eres to J the former, while the difference of speed roduces'a pull ng or stretching effecflxw fch My 'mprovernent is. directed more particuon for a considerable time'on the. thicker sides of the block's without reducing. them too much at those points; 'The bearlng-blocks are mounted to slide in the frames and are held; atthe desired distance apart by the screws 4. The' roller-shafts 5 6 carry the rollers 7 .8. The latter are corrugated ci'r cumferentiallyand mesh with each other, as shown: 1 I

Mounted-fin suitable bearings below the rollers at the bottom of ivthe machine is a ower-shaft 9, provided'at one end with a in- 1on 10, meshin with a larger gear-whee 1'1 sistency. "Thefriction thus caused produces sufilcientheat to warm the-mass thoroughly. The: corrugations on the rolls have the effect of increasing the active surface thereof by as. -rnuch'as fifty per cent., or more if desired, andat the same time the effect on the rubber du'ejtodifferenceof'speed between the rolls is I also 1 largely increased. This is due-to the You the frontro l-shaft 5. On the same end fact that theperipheral speed of the rolls as of the shaft 9 is a smaller p nion 12, engagrng 5 a .cppose'd totheangular sp'eedisgreater at-the" alarger pinion 13 on a counter-shaft 14, winch of a ridge than at the bottom of a at its opposite end carriesa smaller pinion i Hence the, rubber in the grooves is 15, mes ng with a large gear 16 on the roll-. t. a different speed fromthat on the. shaft 6'. It will-therefore be seen that whlle speed; Consequently the rubber is speed by reason of the difierence in size bei ;-suh3 edto 'a difference of speed on the tween the gears 10 and 11 the reducing gears i more rapidly moving roller itself, and 'it 12, 13, and 15-cause the roller to revolve at therefore et's a more energetic kneading amuch lower rate. i 1 than woul be the case if'smooth rolls were- 1 Arranged longitud nally of the roller-8 is 50 used'and dependence-therefor placed onlystationary knife 17 011 a bar 18, fixed b i on. the driving ofone faster than the other. tween the end frames 1 and 2. The knife In other words, with smooth rollers the pull-. has a corrugated edge conforming to the coring or kneading of the batch is substantially rugati'ons on the roller On the other'slde of I uniform along the line of contact, whereas the machine is a's nnlar knife .19, carrled I-ro 5 with my corrugated rollers the rubber on the by arms 20,-, pivoted at their. lower ends to ridges of he more rapidly revolving roller is the frames 1 and 2 so'that. the knife may be in'g s'to an elliptical form. Such wear can go 3.0 1

me from the'mere difference of anthe roller .7 is .driven at comparatively low foo on rods 22.

swung into or out of engagement with the 'mass'of rubber in the roll 5. 1 Both blades are inclined downward,so as to have a scraping effect on the rollers, which revolve m the direction of the arrows seen at theperiplr cries of the gears 11 and 16111 Fig. 3, Pieces of rubber sometimes adhere to theslower roller and would be carried around with it but for the knife 17, which scrapes them off into the pan 21, supported below the rollers When it is desired'to remove the batchadhering to the faster roller, the knife-19 is thrown against the same, and as the roller continues to revolve the mass is scraped off by the knife and is seized by the operator or is'allowed to drop lnto'the pan 21.

pulling,

of homogeneity,

-1ng with corrugations means forrotat ng one In using the machine the batch of rubberis deposited between the rollers.- As alreadv rubber, the combinationof a pair of coacting;

rollers, each having corrugations intermesh roller faster than the other, as set forth on the other, and

' rial on theother, and

2. I11 a machine for mixingmnd kneading rubber, the combination of a pair of coacting rollers,,each having circumferential corrugations'intermeshing with similar corrugations means for rotating one roller faster than the other, as set forth.

3. In a-machine for mixing and kneading rubber, the combination of a pair of'coacting rollers, each having circumferential corrugations intermeshingwith similar corrugations on the other, means for rotating one roller faster than the other, a'scraping-knife arranged in operative relation to the slower roller, and a'movable knife adapted to be swung into and out of engagement with the faster roller, as set'forth.

4. In a machine for mixing and kneading rubber, the combination of a pair of coact-ing rollers, each having circumferentlal corruga tions intermeshi'ng with similar corrugations on the other, means for rotating one roller,

faster than the other, a knife havinga similarly-cgrrugated edge arranged with its teeth entering the grooves on the slower roller, constituting a scraper to detach pieces of mateadhering to the said roller, and a'similarly-corrugated knife mounted to be swung into and out'of engagement with the faster roller to detach the. from at will, as set forth.

CARII'F. OBERMAIER. Witnesses:

EUGENE A. BREMsER, F. HERDLING.

mass of material there-' 

